A142186 Primes congruent to 9 mod 40.

89, 409, 449, 569, 769, 809, 929, 1009, 1049, 1129, 1249, 1289, 1409, 1489, 1609, 1889, 2089, 2129, 2609, 2689, 2729, 2969, 3049, 3089, 3169, 3209, 3329, 3449, 3529, 3769, 3889, 3929, 4049, 4129, 4289, 4409, 4649, 4729, 4889, 4969, 5009, 5209, 5449, 5569

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Formula

a(n) ~ 16n log n. - Charles R Greathouse IV, Jul 03 2016

Mathematica

Select[Prime[Range[2000]], MemberQ[{9}, Mod[#, 40]]&] (* Vincenzo Librandi, Aug 20 2012 *)

Prog

(Magma)[p: p in PrimesUpTo(7000) | p mod 40 eq 9]; // Vincenzo Librandi, Aug 20 2012
(PARI) is(n)=isprime(n) && n%40==9 \\ Charles R Greathouse IV, Jul 03 2016

Crossrefs

Cf. A000040.

Sequence in context: A061372 A254754 A083473 * A142757 A051416 A279366

Adjacent sequences: A142183 A142184 A142185 * A142187 A142188 A142189

Keyword

nonn,easy

Author

N. J. A. Sloane, Jul 11 2008

Status

approved